7(7r+21)=2r

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Solution for 7(7r+21)=2r equation:


Simplifying
7(7r + 21) = 2r

Reorder the terms:
7(21 + 7r) = 2r
(21 * 7 + 7r * 7) = 2r
(147 + 49r) = 2r

Solving
147 + 49r = 2r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-2r' to each side of the equation.
147 + 49r + -2r = 2r + -2r

Combine like terms: 49r + -2r = 47r
147 + 47r = 2r + -2r

Combine like terms: 2r + -2r = 0
147 + 47r = 0

Add '-147' to each side of the equation.
147 + -147 + 47r = 0 + -147

Combine like terms: 147 + -147 = 0
0 + 47r = 0 + -147
47r = 0 + -147

Combine like terms: 0 + -147 = -147
47r = -147

Divide each side by '47'.
r = -3.127659574

Simplifying
r = -3.127659574

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